LG 40LH5300 User manual

P/NO : MFL69584202 (1604-REV00)
CHASSIS : LA68H
MODEL : 40LH5300 40LH5300-UA
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
LED TV
SERVICE MANUAL
Internal Use Only

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Only for training and service purposes
CONTENTS
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ........................................................................ 3
SERVICING PRECAUTIONS ................................................................... 4
SPECIFICATION ...................................................................................... 6
ADJUSTMENT INSTRUCTION ............................................................... 8
TROUBLE SHOOTING GUIDE............................................................... 14
BLOCK DIAGRAM ................................................................................. 19
EXPLODED VIEW .................................................................................. 20

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Only for training and service purposes
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the
Schematic Diagram and Exploded View.
It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent
Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
General Guidance
An isolation Transformer should always be used during the
servicing of a receiver whose chassis is not isolated from the AC
power line. Use a transformer of adequate power rating as this
protects the technician from accidents resulting in personal injury
from electrical shocks.
It will also protect the receiver and it's components from being
damaged by accidental shorts of the circuitry that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this TV receiver is blown,
replace it with the specified.
When replacing a high wattage resistor (Oxide Metal Film Resistor,
over 1 W), keep the resistor 10 mm away from PCB.
Keep wires away from high voltage or high temperature parts.
Before returning the receiver to the customer,
Always perform an AC leakage current check on the exposed
metallic parts of the cabinet, such as antennas, terminals, etc., to
be sure the set is safe to operate without damage of electrical
shock.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source, connect an
electrical jumper across the two AC plug prongs. Place the AC
switch in the on position, connect one lead of ohm-meter to the AC
plug prongs tied together and touch other ohm-meter lead in turn to
each exposed metallic parts such as antenna terminals, phone
jacks, etc.
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1 MΩand 5.2 MΩ.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC voltage
measurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
0.5 mA.
In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
Leakage Current Hot Check circuit
IMPORTANT SAFETY NOTICE
SAFETY PRECAUTIONS

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Only for training and service purposes
SERVICING PRECAUTIONS
CAUTION: Before servicing receivers covered by this service
manual and its supplements and addenda, read and follow the
SAFETY PRECAUTIONS on page 3 of this publication.
NOTE: If unforeseen circumstances create conict between the
following servicing precautions and any of the safety precautions
on page 3 of this publication, always follow the safety precau-
tions. Remember: Safety First.
General Servicing Precautions
1. Always unplug the receiver AC power cord from the AC power
source before;
a. Removing or reinstalling any component, circuit board
module or any other receiver assembly.
b. Disconnecting or reconnecting any receiver electrical plug
or other electrical connection.
c. Connecting a test substitute in parallel with an electrolytic
capacitor in the receiver.
CAUTION: A wrong part substitution or incorrect polarity
installation of electrolytic capacitors may result in an explo-
sion hazard.
2. Test high voltage only by measuring it with an appropriate
high voltage meter or other voltage measuring device (DVM,
FETVOM, etc) equipped with a suitable high voltage probe.
Do not test high voltage by "drawing an arc".
3. Do not spray chemicals on or near this receiver or any of its
assemblies.
4. Unless specied otherwise in this service manual, clean
electrical contacts only by applying the following mixture to the
contacts with a pipe cleaner, cotton-tipped stick or comparable
non-abrasive applicator; 10 % (by volume) Acetone and 90 %
(by volume) isopropyl alcohol (90 % - 99 % strength)
CAUTION: This is a ammable mixture.
Unless specied otherwise in this service manual, lubrication
of contacts in not required.
5. Do not defeat any plug/socket B+ voltage interlocks with which
receivers covered by this service manual might be equipped.
6. Do not apply AC power to this instrument and/or any of its
electrical assemblies unless all solid-state device heat sinks
are correctly installed.
7. Always connect the test receiver ground lead to the receiver
chassis ground before connecting the test receiver positive
lead.
Always remove the test receiver ground lead last.
8. Use with this receiver only the test xtures specied in this
service manual.
CAUTION: Do not connect the test xture ground strap to any
heat sink in this receiver.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid-state) devices can be damaged eas-
ily by static electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES
devices are integrated circuits and some eld-effect transistors
and semiconductor “chip” components. The following techniques
should be used to help reduce the incidence of component dam-
age caused by static by static electricity.
1. Immediately before handling any semiconductor component or
semiconductor-equipped assembly, drain off any electrostatic
charge on your body by touching a known earth ground. Alter-
natively, obtain and wear a commercially available discharg-
ing wrist strap device, which should be removed to prevent
potential shock reasons prior to applying power to the unit
under test.
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such as
aluminum foil, to prevent electrostatic charge buildup or expo-
sure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder
ES devices.
4. Use only an anti-static type solder removal device. Some sol-
der removal devices not classied as “anti-static” can generate
electrical charges sufcient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate
electrical charges sufcient to damage ES devices.
6. Do not remove a replacement ES device from its protective
package until immediately before you are ready to install it.
(Most replacement ES devices are packaged with leads elec-
trically shorted together by conductive foam, aluminum foil or
comparable conductive material).
7. Immediately before removing the protective material from the
leads of a replacement ES device, touch the protective mate-
rial to the chassis or circuit assembly into which the device will
be installed.
CAUTION: Be sure no power is applied to the chassis or cir-
cuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replace-
ment ES devices. (Otherwise harmless motion such as the
brushing together of your clothes fabric or the lifting of your
foot from a carpeted oor can generate static electricity suf-
cient to damage an ES device.)
General Soldering Guidelines
1. Use a grounded-tip, low-wattage soldering iron and appropri-
ate tip size and shape that will maintain tip temperature within
the range or 500 °F to 600 °F.
2. Use an appropriate gauge of RMA resin-core solder composed
of 60 parts tin/40 parts lead.
3. Keep the soldering iron tip clean and well tinned.
4. Thoroughly clean the surfaces to be soldered. Use a mall wire-
bristle (0.5 inch, or 1.25 cm) brush with a metal handle.
Do not use freon-propelled spray-on cleaners.
5. Use the following unsoldering technique
a. Allow the soldering iron tip to reach normal temperature.
(500 °F to 600 °F)
b. Heat the component lead until the solder melts.
c. Quickly draw the melted solder with an anti-static, suction-
type solder removal device or with solder braid.
CAUTION: Work quickly to avoid overheating the circuit
board printed foil.
6. Use the following soldering technique.
a. Allow the soldering iron tip to reach a normal temperature
(500 °F to 600 °F)
b. First, hold the soldering iron tip and solder the strand
against the component lead until the solder melts.
c. Quickly move the soldering iron tip to the junction of the
component lead and the printed circuit foil, and hold it there
only until the solder ows onto and around both the compo-
nent lead and the foil.
CAUTION: Work quickly to avoid overheating the circuit
board printed foil.
d. Closely inspect the solder area and remove any excess or
splashed solder with a small wire-bristle brush.

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Only for training and service purposes
IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) through
which the IC leads are inserted and then bent at against the cir-
cuit foil. When holes are the slotted type, the following technique
should be used to remove and replace the IC. When working with
boards using the familiar round hole, use the standard technique
as outlined in paragraphs 5 and 6 above.
Removal
1. Desolder and straighten each IC lead in one operation by
gently prying up on the lead with the soldering iron tip as the
solder melts.
2. Draw away the melted solder with an anti-static suction-type
solder removal device (or with solder braid) before removing
the IC.
Replacement
1. Carefully insert the replacement IC in the circuit board.
2. Carefully bend each IC lead against the circuit foil pad and
solder it.
3. Clean the soldered areas with a small wire-bristle brush.
(It is not necessary to reapply acrylic coating to the areas).
"Small-Signal" Discrete Transistor
Removal/Replacement
1. Remove the defective transistor by clipping its leads as close
as possible to the component body.
2. Bend into a "U" shape the end of each of three leads remain-
ing on the circuit board.
3. Bend into a "U" shape the replacement transistor leads.
4. Connect the replacement transistor leads to the corresponding
leads extending from the circuit board and crimp the "U" with
long nose pliers to insure metal to metal contact then solder
each connection.
Power Output, Transistor Device
Removal/Replacement
1. Heat and remove all solder from around the transistor leads.
2. Remove the heat sink mounting screw (if so equipped).
3. Carefully remove the transistor from the heat sink of the circuit
board.
4. Insert new transistor in the circuit board.
5. Solder each transistor lead, and clip off excess lead.
6. Replace heat sink.
Diode Removal/Replacement
1. Remove defective diode by clipping its leads as close as pos-
sible to diode body.
2. Bend the two remaining leads perpendicular y to the circuit
board.
3. Observing diode polarity, wrap each lead of the new diode
around the corresponding lead on the circuit board.
4. Securely crimp each connection and solder it.
5. Inspect (on the circuit board copper side) the solder joints of
the two "original" leads. If they are not shiny, reheat them and
if necessary, apply additional solder.
Fuse and Conventional Resistor
Removal/Replacement
1. Clip each fuse or resistor lead at top of the circuit board hollow
stake.
2. Securely crimp the leads of replacement component around
notch at stake top.
3. Solder the connections.
CAUTION: Maintain original spacing between the replaced
component and adjacent components and the circuit board to
prevent excessive component temperatures.
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed circuit
board will weaken the adhesive that bonds the foil to the circuit
board causing the foil to separate from or "lift-off" the board. The
following guidelines and procedures should be followed when-
ever this condition is encountered.
At IC Connections
To repair a defective copper pattern at IC connections use the
following procedure to install a jumper wire on the copper pattern
side of the circuit board. (Use this technique only on IC connec-
tions).
1. Carefully remove the damaged copper pattern with a sharp
knife. (Remove only as much copper as absolutely necessary).
2. Carefully scratch away the solder resist and acrylic coating (if
used) from the end of the remaining copper pattern.
3. Bend a small "U" in one end of a small gauge jumper wire and
carefully crimp it around the IC pin. Solder the IC connection.
4. Route the jumper wire along the path of the out-away copper
pattern and let it overlap the previously scraped end of the
good copper pattern. Solder the overlapped area and clip off
any excess jumper wire.
At Other Connections
Use the following technique to repair the defective copper pattern
at connections other than IC Pins. This technique involves the
installation of a jumper wire on the component side of the circuit
board.
1. Remove the defective copper pattern with a sharp knife.
Remove at least 1/4 inch of copper, to ensure that a hazardous
condition will not exist if the jumper wire opens.
2. Trace along the copper pattern from both sides of the pattern
break and locate the nearest component that is directly con-
nected to the affected copper pattern.
3. Connect insulated 20-gauge jumper wire from the lead of the
nearest component on one side of the pattern break to the
lead of the nearest component on the other side.
Carefully crimp and solder the connections.
CAUTION: Be sure the insulated jumper wire is dressed so the
it does not touch components or sharp edges.

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Only for training and service purposes
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
1. Application range
This specification is applied to the LED TV used LA68H
chassis.
2. Requirement for Test
Each part is tested as below without special appointment.
(1) Temperature: 25 °C ± 5 °C(77 °F ± 9 °F), CST: 40 °C ± 5 °C
(2) Relative Humidity: 65 % ± 10 %
(3) Power Voltage
: Standard input voltage (AC 100-240 V~, 50/60 Hz)
* Standard Voltage of each products is marked by models.
(4) Specification and performance of each parts are followed
each drawing and specification by part number in
accordance with BOM.
(5) The receiver must be operated for about 5 minutes prior to
the adjustment.
3. Test method
(1) Performance: LGE TV test method followed
(2) Demanded other specification
- Safety : CE, IEC specification
- EMC : CE, IEC
4. Model General Specification
No. Item Specication Remarks
1 Receiving System ATSC / NTSC-M / 64 QAM / 256 QAM
2 Available Channel
1) VHF : 02~13
2) UHF : 14~69
3) DTV : 02-69
4) CATV : 01~135
5) CADTV : 01~135
3 Input Voltage AC 110V, 60HZ Mark : 110V, 60Hz (N.America)
4 Market North America
5 Screen Size 43/49 inch Wide (1920 × 1080) FHD / 60Hz 43LF5400-UE
49LF5400-UE
40 inch Wide (1920 × 1080) FHD / 60Hz 40LH5300-UA
6 Aspect Ratio 16:9
7 Tuning System FS
8 Module Direct
NC430EUN-AACR1 LGD
FHD / 60Hz
43LF5400-UE
NC490EUN-AACR1 LGD 49LF5400-UE
NC400DUE-VXCP3 INX 40LH5300-UA
9 Operating Environment 1) Temp : 0 ~ 40 deg
2) Humidity : ~ 80 %
10 Storage Environment 1) Temp. : -20 ~ 60 deg
2) Humidity : ~ 85%

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Only for training and service purposes
5. Video resolutions
5.1. Component input(Y, CB/PB, CR/PR)
No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark
1 720*480 15.73 59.94 13.50 SDTV ,DVD 480I
2 720*480 15.73 60.00 13.5135 SDTV ,DVD 480I
3 720*480 31.47 59.94 27.00 SDTV 480P
4 720*480 31.50 60.00 27.027 SDTV 480P
5 1280*720 44.96 59.94 74.176 HDTV 720P
6 1280*720 45.00 60.00 74.25 HDTV 720P
7 1920*1080 33.72 59.94 74.176 HDTV 1080I
8 1920*1080 33.75 60.00 74.25 HDTV 1080I
9 1920*1080 26.97 23.976 74.176 HDTV 1080P
10 1920*1080 27.00 24.00 74.25 HDTV 1080P
11 1920*1080 33.71 29.97 74.176 HDTV 1080P
12 1920*1080 33.75 30.00 74.25 HDTV 1080P
13 1920*1080 67.432 59.94 148.352 HDTV 1080P
14 1920*1080 67.50 60.00 148.50 HDTV 1080P
5.2. HDMI Input(PC/DTV)
No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark
DTV
1 640*480 31.46 59.94 25.125 SDTV 480P
2 640*480 31.5 60.00 25.125 SDTV 480P
3 720*480 15.73 59.94 13.500 SDTV 480I Spec-Out.(Just Display)
4 720*480 15.75 60.00 13.514 SDTV 480I Spec-Out.(Just Display)
5 720*480 31.47 59.94 27.00 SDTV 480P
6 720*480 31.5 60.00 27.027 SDTV 480P
7 1280*720 44.96 59.94 74.176 HDTV 720P
8 1280*720 45 60.00 74.25 HDTV 720P
9 1920*1080 33.72 59.94 74.176 HDTV 1080I
10 1920*1080 33.75 60.00 74.25 HDTV 1080I
11 1920*1080 26.97 23.97 74.176 HDTV 1080P
12 1920*1080 27.00 24.00 74.25 HDTV 1080P
13 1920*1080 33.71 29.97 74.176 HDTV 1080P
14 1920*1080 33.75 30.00 74.25 HDTV 1080P
15 1920*1080 67.43 59.94 148.352 HDTV 1080P
16 1920*1080 67.5 60.00 148.50 HDTV 1080P
No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark
PC DDC
1 640*350 @70Hz 31.46 70.09 25.17 EGA X
2 720*400 @70Hz 31.46 70.08 28.32 DOS O
3 640*480 @60Hz 31.46 59.94 25.17 VESA(VGA) O
4 800*600 @60Hz 37.87 60.31 40.00 VESA(SVGA) O
5 1024*768 @60Hz 48.36 60.00 65.00 VESA(XGA) O
6 1152*864 @60Hz 54.34 60.05 80.002 VESA O
7 1280*1024 @60Hz 63.98 60.02 108.0 VESA (SXGA) O FHD only
8 1360*768 @60Hz 47.71 60.01 85.50 VESA (WXGA) O
9 1920*1080 @60Hz 67.5 60.00 148.5 WUXGA(CEA 861D) O FHD only

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Only for training and service purposes
ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied to all of the LED TV with
LA68H chassis.
2. Specification
(1) Because this is not a hot chassis, it is not necessary to
use an isolation transformer. However, the use of isolation
transformer will help protect test instrument.
(2) Adjustment must be done in the correct order.
(3) The adjustment must be performed in the circumstance of
25 ±5 ºC of temperature and 65±10% of relative humidity if
there is no specific designation
(4) The input voltage of the receiver must keep 100~240V,
50/60Hz
(5) At first Worker must turn on the SET by using Power Only
key.
(6) The receiver must be operated for about 5 minutes prior to
the adjustment when module is in the circumstance of over
15 ºC
In case of keeping module is in the circumstance of 0°C, it
should be placed in the circumstance of above 15°C for 2
hours
In case of keeping module is in the circumstance of below
-20°C, it should be placed in the circumstance of above
15°C for 3 hours.
※Caution
When still image is displayed for a period of 20 minutes or
longer (especially where W/B scale is strong.
Digital pattern 13ch and/or Cross hatch pattern 09ch), there
can some afterimage in the black level area
3. Adjustment items
3.1. Main PCBA Adjustments
(1) ADC adjustment : ADC adjustment is OTP (Auto ADC)
(2) EDID download : HDMI
■ Above adjustment items can be also performed in Final
Assembly if needed.
Both Board-level and Final assembly adjustment items can
be check using In-Start Menu (1.Adjust Check).
3.2. Final assembly adjustment
(1) White Balance adjustment
(2) RS-232C functionality check
(3) Factory Option setting per destination
(4) Shipment mode setting (In-Stop)
(5) GND and HI-POT test
(6) AUDIO output check
(7) EYE-Q function check
3.3. Appendix
(1) Shipment conditions
(2) Tool option menu
(3) USB Download (S/W Update, Option and Service only)
(4) Preset CH Information
4. MAIN PCBA Adjustments
* Download
(1) Execute ISP program “Mstar ISP Utility” and then click
“Config” tab.
(2) Set as below, and then click “Auto Detect” and check “OK”
message
If display “Error”, Check connect computer, jig, and set.
(3) Click “Connect” tab. If display “Can’t ”, Check connect
computer, jig, and set.
(4) Click “Read” tab, and then load download file(XXXX.bin)
by clicking “Read”
(5) Click “Auto” tab and set as below
(6) Click “Run”.
(7) After downloading, check “OK” message.
(
1
)
(3
)
(
2
)
OK
Please Check the Speed :
To use speed between from 200KHz to 400KHz
(
4
)
filexxx.bin
(
5
)
(6)
(7) ……….OK

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Only for training and service purposes
4.1. ADC Adjustment
4.1.1. ADC
▪ ADC adjustment is needed to find the optimum black level
and gain in Analog-to-Digital device and to compensate RGB
deviation.
▪ ADC adjustment is OTP (Auto ADC)
4.2. EDID Download
4.2.1. Overview
- It is a VESA regulation. A PC or a MNT will display an
optimal resolution through information sharing without any
necessity of user input. It is a realization of “Plug and Play”.
4.2.2. Equipment
(1) Since EDID data is embedded, EDID download JIG, HDMI
cable is not need.
(2) Adjust by using remote controller.
4.2.3. Download method(using DFT)
* PC(for communication through RS-232C), UART baud rate:
115200 bps
Command : aa 00 00 (Start Factory mode)
Command : ae 00 10 (Download All EDID)
Command : aa 00 90 (End of Factory mode)
4.2.4. Download method (using Service Remocon)
(1) Press Adj. key on the Adj. R/C.
(2) Select EDID D/L menu.
(3) By pressing Enter key, EDID download will begin
(4) If Download is successful, OK is display, but If Download is
failure, NG is displayed.
(5) If Download is failure, Re-try downloads.
* Caution: When EDID Download, must remove HDMI Cable.
(6) EDID Write confirmation
4.2.5. Models for EDID Data
4.2.6. EDID DATA
- 8BIT / FHD / AC3
- Checksum
4.3. Tool Option Input
- Input Model Tool Option according to BOM
Region FHD / 8bit
HDMI 2ea
North America (AC3) 43/49LF5400-UE
40LH5300-UA
EDID D/L (PCM)
HDMI1 : OK
HDMI2 : OK
0 1 2 3 4 5 6 7 8 9 A B C D E F
00 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 01 1A 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26
20 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80
30 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
40 45 00 40 84 63 00 00 1E 66 21 50 B0 51 00 1B 30
50 40 70 36 00 40 84 63 00 00 1E 00 00 00 FD 00 3A
60 3E 1E 53 10 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 E5
00 02 03 1C F1 48 90 22 20 05 04 03 02 01 26 15 07
10 50 09 57 07 67 03 0C 00 10 00 80 1E 02 3A 80 18
20 71 38 2D 40 58 2C 04 05 40 84 63 00 00 1E 01 1D
30 80 18 71 1C 16 20 58 2C 25 00 40 84 63 00 00 9E
40 01 1D 00 72 51 D0 1E 20 6E 28 55 00 40 84 63 00
50 00 1E 8C 0A D0 8A 20 E0 2D 10 10 3E 96 00 40 84
60 63 00 00 18 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 96
AC3 not Deep Color, AC3
8Bit_FHD
HDMI1 E596

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Only for training and service purposes
5. Final Assembly Adjustment
5.1. White Balance Adjustment
5.1.1. Overview
5.1.1.1. W/B adj. Objective & How-it-works
(1) Objective: To reduce each Panel’s W/B deviation
(2) How-it-works:
When R/G/B gain in the OSD is at 192, it means the panel
is at its Full Dynamic Range.
In order to prevent saturation of Full Dynamic range and
data, one of R/G/B is fixed at 192, and the other
two is lowered to find the desired value.
(3) Adj. condition: normal temperature
- Surrounding Temperature: 25±5 ºC
- Warm-up time: About 5 Min
- Surrounding Humidity: 20% ~ 80%
- Before White balance adjustment, Keep power on status,
don’t power off
5.1.1.2. Adj. condition and cautionary items
(1) Lighting condition in surrounding area surrounding lighting
should be lower 10 lux. Try to isolate adj. area into dark
surrounding.
(2) Probe location: Color Analyzer (CA-210) probe should be
within 10cm and perpendicular of the module surface
(80°~ 100°)
(3) Aging time
- After Aging Start, Keep the Power ON status during 5
Minutes.
- In case of LCD, Back-light on should be checked using
no signal or Full-white pattern.
5.1.2. Equipment
(1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED:
CH14)
(2) Adj. Computer(During auto adj., RS-232C protocol is
needed)
(3) Adjust Remocon
(4) Video Signal Generator MSPG-925F 720p/204-Gray
(Model:217, Pattern:49)
→ Only when internal pattern is not available
※Color Analyzer Matrix should be calibrated using
CS-1000
5.1.3. Equipment connection
When you connect the RS232 to set Phone jack, please use
3pin phone jack cable.
5.1.4. Adjustment Command (Protocol)
(1) RS-232C Command used during auto-adj
Ex) wb 00 00 -> Begin white balance auto-adj.
wb 00 10 -> Gain adj.
ja 00 ff -> Adj. data
jb 00 c0
...
...
wb 00 1f -> Gain adj. complete
*(wb 00 20(start), wb 00 2f(end)) -> Off-set adj.
wb 00 ff ->End white balance auto adj.
(2) Adjustment Map
Color Analyzer
Computer
Pattern Generator
RS-232C
RS-232C
RS-232C
Probe
Signal Source
* If TV internal pattern is used, not needed
Adj. item Command
(lower caseASCII)
Data Range
(Hex.)
Default
(Decimal)
CMD1 CMD2 MIN MAX
Cool
R Gain j g 00 C0 172
G Gain j h 00 C0 172
B Gain j i 00 C0 192
R Cut 128
G Cut 128
B Cut 128
Medium
R Gain j a 00 C0 192
G Gain j b 00 C0 192
B Gain j c 00 C0 192
R Cut 128
G Cut 128
B Cut 128
Warm
R Gain j d 00 C0 192
G Gain j e 00 C0 192
B Gain j f 00 C0 172
R Cut 128
G Cut 128
B Cut 128
RS-232C
COMMAND
Explanation
CMD ID DATA
Wb 00 00 Begin White Balance adj.
Wb 00 ff End White Balance adj. (internal pattern disappears )

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Only for training and service purposes
5.1.5. Adjustment method
5.1.5.1. Auto WB calibration
(1) Set TV in ADJ mode using P-ONLY key (or POWER ON
key)
(2) Place optical probe on the center of the display
- It need to check probe condition of zero calibration before
adjustment.
(3) Connect RS-232C Cable
(4) Select mode in ADJ Program and begin a adjustment.
(5) When WB adjustment is completed with OK message,
check adjustment status of pre-set mode (Cool, Medium,
Warm)
(6) Remove probe and RS-232C cable.
*W/B Adj. must begin as start command “wb 00 00” , and
finish as end command “wb 00 ff”, and Adj. offset if need.
5.1.5.2. Manual adj. method
(1) Set TV in Adj. mode using POWER ON
(2) Zero Calibrate the probe of Color Analyzer, then place it on
the center of LCD module within 10cm of the surface.
(3) Press ADJ key -> EZ adjust using adj. R/C -> 6. White-
Balance then press the cursor to the right (KEY►).
(When KEY(►) is pressed 204 Gray(80IRE) internal
pattern will be displayed)
(4) One of R Gain / G Gain / B Gain should be fixed at 192,
and the rest will be lowered to meet the desired value.
(5) Adj. is performed in COOL, MEDIUM, WARM 3 modes of
color temperature.
* CASE
First adjust the coordinate far away from the target value(x, y).
1. x, y > target
1) Decrease the R, G.
2. x, y < target
1) First decrease the B gain,
2) Decrease the one of the others.
3. x > target , y < target
1) First decrease B, so make y a little more than the target.
2) Adjust x value by decreasing the R
4. x < target, y > target
1) First decrease B, so make x a little more than the target.
2) Adjust x value by decreasing the G
► How to adjust
1.Fix G gain at least 172
Adjust R, B Gain ( In Case of Mostly Blue Gain Saturation)
2. When R or B Gain > 255, Release Fixed G Gain and
Readjust
* CASE Medium / Warm
First adjust the coordinate far away from the target value(x, y).
1. x, y > target
1) Decrease the R, G.
2. x, y < target
1) First decrease the B gain,
2) Decrease the one of the others.
3. x > target, y < target
1) First decrease B, so make y a little more than the target.
2) Adjust x value by decreasing the R
4. x < target, y > target
1) First decrease B, so make x a little more than the target.
2) Adjust x value by decreasing the G
5.1.6. Reference
(White Balance Adj. coordinate and color
temperature)
▪ Luminance: 204 Gray, 80IRE
**(normal line) Model : For LGD (LF54xx)
▪ Standard color coordinate and temperature using CA-210(CH
14) – by aging time
**(aging chamber) Model : For LGD (LF54xx)
▪ Standard color coordinate and temperature using
CA-210(CH-14) – by aging time
** For INX,AUO,SHARP,CSOT Module.( In the case of , the
color temperature spec of cool mode is 13000K)
L16 Aging time
(Min)
Cool Medium Warm
x y x y x y
271 270 286 289 313 329
1 0-2 281 285 296 304 323 344
2 3-5 280 284 295 303 322 343
3 6-9 279 282 294 301 321 341
4 10-19 277 279 292 288 319 338
5 20-35 275 275 290 294 317 334
6 36-49 273 273 288 292 315 332
7 50-79 272 272 287 291 314 331
8 80-119 271 270 286 289 313 329
9 Over 120 271 270 286 289 313 329
L16 Aging time
(Min)
Cool Medium Warm
xyxyxy
271 270 286 289 313 329
1 0-2 280 285 295 304 319 340
2 3-5 276 280 291 299 315 335
3 6-9 272 275 287 294 311 330
4 10-19 269 272 284 291 308 327
5 20-35 267 268 282 287 306 323
6 36-49 266 265 281 284 305 320
7 50-79 265 263 280 282 304 318
8 80-119 264 261 279 280 303 316
9 Over 120 264 260 279 279 303 315
Cool med warm
x y x y x y
spec 271 270 286 289 313 329
target 276 277 291 296 318 336

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Only for training and service purposes
5.2. Tool Option setting & Inspection per
countries
5.2.1. Overview
(1) Tool option selection is only done for models in Non-USA
North America due to rating
(2) Applied model: LA57A Chassis applied to CANADA and
MEXICO
5.2.2. Country Group selection
(1) Press ADJ key on the Adj. R/C, and then select Country
Group Menu
(2) Depending on destination, select US, then on the lower
Country option, select US, CA, MX.
Selection is done using +, - KEY
(3) Using DFT(Auto)
* PC (for communication through RS-232C) -> UART Baud
rate : 115200 bps
- Command : ah 00 00 DATA(Area Number(hexadecimal))
5.2.3. Tool Option Inspection
- Method : Press Adj. key on the Adj. R/C, then select Tool
option.
5.3. Ship-out mode check (In-stop)
▪ After final inspection, press In-Stop key of the Adj. R/C and
check that the unit goes to Stand-by mode.
6. GND and HI-POT Test
6.1. GND & HI-POT auto-check preparation
(1) Check the POWER CABLE and SIGNAL CABE insertion
condition.
6.2. GND & HI-POT auto-check
(1) Pallet moves in the station.(POWER CORD / AV CORD is
tightly inserted)
(2) Connect the AV JACK Tester.
(3) Controller (GWS103-4) on.
(4) GND Test (Auto)
- If Test is failed, Buzzer operates.
- If Test is passed, execute next process(Hi-pot test).
(Remove A/V CORD from A/V JACK BOX)
(5) HI-POT test (Auto)
- If Test is failed, Buzzer operates.
- If Test is passed, GOOD Lamp on and move to next
process automatically.
6.3. Checkpoint
(1) Test voltage
1) 3 Poles
- GND: 1.5 KV/min at 100 mA
- SIGNAL: 3 KV/min at 100 mA
2) 2 Poles
- SIGNAL: 3 KV/min at 100 mA
(2) TEST time: 1 second
(3) TEST POINT
1) 3 Poles
- GND Test = POWER CORD GND and SIGNAL
CABLE GND.
- Hi-pot Test = POWER CORD GND and LIVE & NEUTRAL.
2) 2 Poles
- Hi-pot Test = Accessible Metal and LIVE & NEUTRAL.
(4) LEAKAGE CURRENT: At 0.5 mArms
7. Audio
7.1. Audio input condition
(1) RF input: Mono, 1KHz sine wave signal, 100% Modulation
(2) CVBS, Component: 1KHz sine wave signal (0.4Vrms)
7.2. Specification
Item Min Typ Max Unit Remark
Audio practical max
Output, L/R
(Distortion=10% max
Output)
4.5
6.0
5.0
6.3
6.0
6.9
W
Vrms
(1) Measurement condition
- EQ/AVL/Clear Voice: Off
(2) Speaker (6Ω Impedance)
LF54 Series
ITEM DATA(Area Number) AREA
0 USA
AREA OPTION1 1 CANADA
2 MEXICO

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Only for training and service purposes
8. USB S/W Download(Service only)
(1) Put the USB Stick to the USB socket
(2) Automatically detecting update file in USB Stick
- If your downloaded program version in USB Stick is
Lower, it didn’t work.
But your downloaded version is Higher, USB data is
automatically detecting (Download Version High & Power
only mode, Set is automatically Download)
(3) Show the message “Copying files from memory”
(4) Updating is starting.
(5) Updating Completed, the TV will restart automatically.
(6) If your TV is turned on, check your updated version and
Tool option. (explain the Tool option, next stage)
* If downloading version is more high than your TV have,
TV can lost all channel data. In this case, you have to
channel recover. if all channel data is cleared, you didn’t
have a DTV/ATV test on production line.
* After downloading, have to adjust Tool Option again.
(1) Push "IN-START" key in service remote control.
(2) Select "Tool Option 1" and push "OK" key.
(3) Punch in the number. (Each model has their number)

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Only for training and service purposes
TROUBLE SHOOTING GUIDE
1. Power-up boot check
Check PSU DC Voltage
P200_4,5,6 pin : 13.2V
Check stand-by Voltage
L202 : +3.3V
Check P200 PWR_ON.
1pin : 3.3V
Check X100 clock
24 MHz
Check Mstar LVDS
Output
Check DRV ON Control
P200 11pin : High
Change Module
Check TCON(Module)
Panel_VCC
Q205 : 13.2V
Check DC Output Voltage
IC202 : 1.15V & 5V
IC200 : 1.8V
Q204 : 3.3V
NO
NO
NO
NO
NO
NO
NO
NO
OK
OK
NO
OK
Check 12pin
Power connector
Main B/D 3.3V Line
Short Check
Re-download software.
Replace X100
Replace Mstar(IC102) or
Main Board
Check PSU
Replace Q205
Replace IC402, IC403,
IC404, Q403
Main B/D 13.2V Line
Short Check
Replace IC201
(DCDC)
Replace Mstar(IC102)
or Main board
Replace PSU
OK
OK
OK
OK
OK
OK
OK
OK

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2. Digital / Analog TV Video
3. AV Video
Check RF Cable & Signal
Check input signal format.
Is it supported?
Check AV Cable for damage
for damage or open
conductor
Check Tuner 3.3V Power
L500
Check JK401,
CVBS Signal Line
R120
Check IF_P/N Signal
TU501 7, 8 Pin
Check CVBS_DET Signal
Check Mstar LVDS Output
Check Mstar LVDS
Output
NO
NO
NO
NO
NO
NO
Replace L500
Replace Jack
Bad Tuner.
Replace Tuner.
Replace AR401 or R110
Replace Mstar(IC102)
or Main Board.
Replace Mstar(IC102)
or Main Board.
OK
OK
OK
OK
OK
OK
OK

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Only for training and service purposes
4. Component Video
Check input signal format.
Is it supported?
Check Component Cable
for damage or open
conductor.
Check JK401
Y/PB/PR signal Line
Check COMP_DET
Signal
Check Mstar LVDS
Output
NO
NO
NO
Replace Jack
Replace AR401or R109
Replace Mstar(IC101) or
Main Board.
OK
OK
OK
OK
5. HDMI Video
Check input signal format.
Is it supported?
Check HDMI Cable conductors
for damage or open conductor.
Check EDID
AR102, AR101, AR410, AR411 I2C
Signal
Check JK403, JK404
Check HDMI_DET (HPD)
Check HDMI Signal
Check Mstar LVDS
Output
NO
NO
NO
NO NO
NO
Replace the defective IC or
re-download EDID data
Replace Jack
Replace R418, R410,
Q400, R419
Check other set
If no problem, check signal line
Replace Main Board
Replace Mstar(IC101) or
Main Board.
OK
OK
OK
OK
OK
OK

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Only for training and service purposes
6. All Source Audio
Check the TV Speaker Menu
(Menu -> Audio -> TV Speaker)
Check AMP IC(IC5600) Power
24V, 3.3V
Check AMP I2C Line
AR111, R5604, R5605
Check Mstar AUDIO_MASTER_CLK
R148
Check Connector &
P5600
Check speaker resistance
and connector damage.
Check Output Signal
P5600
6, 7, 38 pin.
Check Mstar I2S Output
IC5600 20,21,22 Pin
OFF
NO
NO
NO
NO
NO
NO
NO
Toggle the Menu
Replace Amp IC(IC5600)
Check signal line.
Or replace Mstar(IC101)
Replace Mstar(IC101)
or Main Board.
Replace connector
if found to be damaged.
Replace speaker.
Replace Audio AMP
IC(IC5600)
Check signal line.
Or replace Mstar(IC101)
ON
OK
OK
OK
OK
OK
OK

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7. Digital / Analog TV Audio
8. AV Audio
9. Component Audio
Check RF Cable & Signal
Check Tuner 3.3V Power
L500
Check Tuner I2C
AR500, R502, R503
Check IF_P/N Signal
TU501 7, 8 Pin
Follow procedure
‘7. All source audio’
trouble shooting guide.
NO
NO
NO
Replace L500
Replace AR500, R502,
R503
Bad Tuner.
Replace Tuner.
OK
OK
OK
OK
Check AV Cable for damage
for damage or open conductor
Check Component Cable
for damage or open conductor.
Check JK401 Signal Line
R409 ,R406
Check JK401 Signal Line
R409 ,R406
Follow procedure
‘7. All source audio’
trouble shooting guide.
Follow procedure
‘7. All source audio’
trouble shooting guide.
NO
NO
Replace Jack
Replace Jack
OK
OK
OK
OK

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BLOCK DIAGRAM

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Only for training and service purposes
900
200
400
800
540
810
910
521
530
820
500
351
121
120
LV1
A10
A2 700
EXPLODED VIEW
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE